cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Tidy formatting

Browse Source
This commit is contained in:
Chris Ward 2019-04-08 11:46:32 +02:00
parent 26d6305a43
commit 4a6d6cb14f
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
docs/units-and-global-variables.rst
View File

@ -188,9 +188,9 @@ Mathematical and Cryptographic Functions
.. warning::
If you use ``ecrecover``, be aware that a valid signature can be turned into a different valid signature without requiring
knowledge of the corresponding private key. Since `EIP-2 <http://eips.ethereum.org/EIPS/eip-2#specification>`_, all transaction signatures with an ``s`` value
greater than ``secp256k1n/2`` are considered invalid.
If you use ``ecrecover``, be aware that a valid signature can be turned into a different valid signature without
requiring knowledge of the corresponding private key. Since `EIP-2 <http://eips.ethereum.org/EIPS/eip-2#specification>`_,
all transaction signatures with an ``s`` value greater than ``secp256k1n/2`` are considered invalid.
This is usually not a problem unless you require signatures to be unique or
use them to identify items. OpenZeppelin have a `ECDSA helper library <https://docs.openzeppelin.org/docs/cryptography_ecdsa>`_ that you can use as a wrapper for ``ecrecover`` without this issue.